このエントリーをはてなブックマークに追加
ID 18712
file
creator
Okamoto, Ryo
Takeuchi, Shigeki
Sasaki, Keiji
abstract
We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals [Phys. Rev. A 66, 024308 (2002); 65, 062324 (2002)] have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method [Phys. Rev. Lett. 94, 160504 (2005)], by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.
journal title
Physical Review Letters
volume
Volume 95
issue
Issue 21
start page
210506-1
end page
210506-4
date of issued
2005-11-18
publisher
American Physical Society
issn
0031-9007
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2005 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter